I've dropped my 3GS in a trashcan full of water(don't ask), and it sank to the bottom. The phone was on and for about 3 hours it didn't work correctly, the screen would just flicker, earpiece didn't work, headphone jack didn't work, etc. But by the end of the day the phone was back to normal. I didn't even do the rice trick.
yeah you can use it....depends on the damage. My roommate thru his into a cup full of water in the car (he usually puts it there but didnt realize there was a cup there this time) with the charger connected and stayed in there for about 45mins in traffic. I took it and took it apart and cleaned/dried it out and it just worked. The face sensor was busted (replaced for like $5), camera didnt work (bought a replacement for about $10), and thats about it. The rest works just fine
i dropped my 4 in a cup of water on accident and put in rice bag for a day it works but the battery drains quickly and i took it apart and noticed the internals are toast.. can it be repaired ?.. no, get it replaced.